Article having self-cleaning coating
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsAtsushi Nishino, Kazunori Sonetaka, Kunio Kimura, Masaki Ikeda
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Abstract
A slip containing a frit and an oxidizing catalyst is sprayed over a substrate and fused at a temperature as low as 550.degree. C. The frit consists of 15-60% by weight of SiO.sub.2, 9-35% of B.sub.2 O.sub.3, 10-30% Na.sub.2 O, 1-25% of Al.sub.2 O.sub.3, 0-20% of Li.sub.2 O, 0-10% of K.sub.2 O and 0-10% of CaO but must have at least two of Li.sub.2 O, K.sub.2 O and CaO. The oxidizing catalyst is MnOx or CuCO.sub.3 Cu(OH).sub.2 or a mixture thereof, the content being preferably between 5 and 50% by weight. The self-cleaning is effected at a temperature as low as at 280.degree. C.
Claims12
An article having a self-cleaning coating comprising a substrate having fused thereon a frit consisting essentially of 15 to 60% by weight of SiO.sub.2, 9 to 35% by weight of B.sub.2 O.sub.3, 10 to 30% by weight of Na.sub.2 O, 1 to 25% by weight of Al.sub.2 O.sub.3, 0 to 25% by weight of TiO.sub.2 and at least two ingredients selected from the group consisting of 0 to 20% by weight of Li.sub.2 O, 0 to 10% by weight of K.sub.2 O, and 0 to 10% by weight of CaO;
- and an oxidizing catalyst selected from the group consisting of the oxides of Mn, Cu, Ni, Co, Sn, V and Mo.
Dependencies are inferred from the claim text.